Wenglor P1NL Series, Operating Instructions Manual

Page: 15 / 17

15 Retro-Reflex Sensor
5.3 Diagnostics
Causes for Triggering the Contamination Warning (blinking LED):
Display LED Diagnosis/Cause Elimination
Continuous blinking
at approx. 2.5 Hz
Contamination Carefully clean the optic cover with a cloth.
Aged emitter diode Replace the sensor.
Unreliable working range
• Increase the sensor’s switching distance.
• Reduce distance between sensor and object.
Continuous blinking
at approx. 5 Hz
Short-circuit Check electrical wiring and eliminate the short-circuit.
Over-temperature
Disconnect the sensor from supply power
and allow it to cool down.
Hardware error Replace the sensor.
Contamination Warning Flowcharts
not detected not detected detected
beginning contamination
not detected not detected detected
Retro Reflective Barrier no contamination
Object
Switching Status Indicator
Object
Switching Status Indicator
Object
Switching Status Indicator
not detected not detected not detected
advanced contamination
on on off
off
off off off
blinking blinking
Object
t
Sensor
Reflector
Sensor
Reflector
Object
Sensor
Reflector
Object
Object
Sensor
Reflector
Sensor
Reflector
Object
Sensor
Reflector
Object
Object
Sensor
Reflector
Sensor
Reflector
Object
Sensor
Reflector
Object